Capsella grandiflora

Capsella grandiflora is a species of flowering plant in the Brassicaceae family. It is referred to by the common name grand shepherd's-purse and is a close relative of Arabidopsis thaliana. It is predicted together with C. orientalis to be the surviving progenitor of C. bursa-pastoris.
The main signature of this plant compared to other Capsella species is its wide flower petals. Together with C. rubella, the species is used as a model plant to study the evolution of self-incompatibility into self-compatibility in plant reproduction.